OFFSET
1,3
COMMENTS
See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "80021".
a(18) > 10^5. - Robert Price, Feb 06 2017
LINKS
EXAMPLE
n = 4 is a member because: 8*10^4+21 = 8*10000+21 = 80000+21 = 80021, which is prime.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005
EXTENSIONS
a(15) from Ray Chandler, Dec 23 2010
Prepended a(1)=0 and a(2)=1 by Robert Price, Feb 06 2017
a(16)-a(17) from Robert Price, Feb 06 2017
STATUS
approved